Searching for potentially invasive maples (Acer sp.) in Slovak cities.
Non-native maples (Acer sp.), as fecund and vigorous trees, have potential to become invasive. In this work, we analysed the foreign maple species structure and abundance in city parks, residential areas and private gardens in Bratislava, Nitra and Zlaté Moravce with the focus on individuals escaped from culture. Silver maple (Acer saccharinum L.) was the most frequently planted maple species in parks and older residential areas. However, in private gardens dominated palm maple (Acer palmatum Thunb.). In new residences architects relied almost exclusively on native species. The only one maple species, in which escape was observed, was the silver maple. Putting together with the typical attributes of plant species invasiveness, we think that this is a good candidate for future invasive species.